PVC foam board raw material
PVC foam board raw material,
PVC resin SG5 for foam board, PVC resin SG8 for foam board,
PVC foam board raw material
Resin: PVC generally uses type 8 resin, which has fast gelation speed during processing, relatively low processing temperature, stable product quality, and easy density control. In recent years, many manufacturers have changed to type 5 resin.
Stabilizer: The selection of stabilizer, taking into account environmental protection and good effect of the preferred rare earth stabilizer, but because of the relatively high price, not promoted, the future with the environmental protection requirements to increase, rare earth stabilizer market will usher in bright prospects. Calcium zinc stabilizer has zinc burning problem and stability effect is slightly poor and the amount is less. At present, the most used or lead salt stabilizer, foam board because of the mold cross-section is wide, the flow channel is long and yellow foam decomposition heat production, the stabilizer is required to have high lead content and good stability effect, otherwise the product is prone to various problems.
Blowing agent: the selection of blowing agent, blowing agent AC in the decomposition process release a lot of heat, easy to lead to the middle of the section yellow, which requires a certain amount of white blowing agent, decomposition plays the role of absorbing excess heat energy, requires the number of blowing agent to be large, in order to achieve uniform foaming without large bubble holes.
Regulator: foaming regulator, through years of research and development and improvement, the process technology of foaming regulator ACR is becoming more and more mature, and the performance quality is becoming more and more stable. According to the thickness of foaming board, the sheet should be plasticized fast, and the thick board should be plasticized slow solution strong foaming regulator.
Lubricants: The selection of lubricants follows the principle of early, middle and late lubrication, so that the materials are protected by lubricants at all stages, and adhere to long-term stable production without fouling.
Foaming auxiliaries: In order to improve foaming quality and foam structure, a small amount of foaming auxiliaries zinc oxide can be added in the production, and a small amount of aluminum silicate can be added in order to reduce precipitation.
Pigments: In order to achieve a more beautiful effect, titanium dioxide and fluorescent whitening agents can be added, and antioxidants and ultraviolet absorbers can be added to improve weather resistance.
Filler: The selection of light calcium carbonate can be, without the use of active calcium, the selection of high mesh number.
The thermoplastic high-molecular polymer made by the suspension polymerization of vinyl chloride monomer. The molecular formula :- (CH2 – CHCl) n – (N: degree of polymerization, N= 590 ~ 1500). It is the most widely raw material used in plastic production. It has good chemical stability, corrosion resistance and water resistance.
Specification
GB/T 5761-2006 Standard
|
Item |
SG3 |
SG5 |
SG7 |
SG8 |
|
|
Viscosity, ml/g (K value) Degree of polymerization |
135~127 (72~71) 1350~1250 |
118~107 (68~66) 1100~1000 |
95~87 (62~60) 850~750 |
86~73 (59~55) 750~650 |
|
|
Number of impurity particle≤ |
30 |
30 |
40 |
40 |
|
|
Volatiles content %,≤ |
0.40 |
0.40 |
0.40 |
0.40 |
|
|
Appearing density g/ml ≥ |
0.42 |
0.45 |
0.45 |
0.45 |
|
|
residue after sieve |
0.25mm ≤ |
2.0 |
2.0 |
2.0 |
2.0 |
|
0.063mm ≥ |
90 |
90 |
90 |
90 |
|
|
Number of grain/400cm2≤ |
40 |
40 |
50 |
50 |
|
|
Plasticizer absorbency value of 100g resin g≥ |
25 |
17 |
- |
- |
|
|
Whiteness %,≥ |
75 |
75 |
70 |
70 |
|
|
Water extractant solution conductivity, [us/(cm.g)]≤ |
5 |
- |
- |
- |
|
|
Residual chloride ethylene content mg/kg≤ |
10 |
10 |
10 |
10 |
|
Applications
Polyvinyl chloride resin has a wide range of applications, such as automobile interiors, family decorative materials, advertising light box, shoe soles, PVC pipes and fittings, PVC profiles and hose, PVC sheet and plate, rolling film, inflatable toys, outdoor products, PVC wire and cable, PVC artificial leather, wood and plastic floor, corrugated board, etc.
Packaging
(1) Packing : 25kg net/pp bag, or kraft paper bag .
(2) Loading quantity : 680Bags/20′container, 17MT/20′container .
(3) Loading quantity : 1000Bags/40′container, 25MT/40′container .
